Prediction of Cadmium uptake by brown rice and derivation of soil-plant transfer models to improve soil protection guidelines
Journal
Environmental Pollution
Journal Volume
157
Journal Issue
8-9
Start Page
2435
End Page
2444
Date Issued
2009-09
Date
2009-09
Author(s)
Abstract
Cadmium (Cd) levels in paddy fields across Taiwan have increased due to emission from industry. To ensure the production of rice that meets food quality standards, predictive models or suitable soil tests are needed to evaluate the quality of soils to be used for rice cropping. Levels of Cd in soil and rice grains were measured in 19 paddy fields across the western plains in Taiwan. Cadmium levels in soil range from less than 0.1 mg kg(-1) to 30 mg kg(-1). Measured Cd levels in brown rice were predicted very well (R(2) > 0.8) based on Cd and Zinc in a 0.01 M CaCl(2) extract or a soil-plant transfer model using the reactive soil Cd content, pH, and cation exchange capacity. In contrast to current soil quality standards used in Taiwan, such models are effective in identifying soils where Cd in rice will exceed food quality standards. (c) 2009 Elsevier Ltd. All rights reserved.
Subjects
Cadmium
Rice
Paddy field
Model
Bioavailability
0.01 M CaCl(2)
Risk assessment
SDGs
Publisher
Elsevier Applied Science Publishers
Type
journal article